You must（）pilot ladder on port side.

单项选择题Four years（）my ship called at this port.

A.before
B.after
C.ago
D.since

单项选择题The man（）you saw yesterday is my Chief Officer.

A.who
B.whom
C.what
D.whose

单项选择题The pilot wants to know（）my ship’s maximum speed is.

A.how much
B.how many
C.about
D.what

单项选择题He has been a Captain（）1992.

A.after
B.since
C.before
D.for

单项选择题There are still（）charts to be corrected.

A.few
B.a few
C.little
D.a little